Question

In the absence of friction, how much work would a child do while pulling a 12 kg wagon a distance of 3.9 m with a 22 N force? O 47J O 60J O 86 J O991

Answer 1

W = 86 J

Step-by-step explanation:

Work done by friction force is given by the formula

`W = F_f . d`

here since the wagon is pulled by horizontal force such that speed remains constant

so here we will have

`F_f = F_(ext) = 22 N`

Now we will have

`W = 22* 3.9`

`W = 86 J`

so work done against friction force will be equal to 86 J